Probably, definitely is. The way Counsell has typically used that 26th spot has been as a "place holder" for better or worse. They did this with guys like Miles Mastrobuoni, Luis Velasquez, etc. And I guess I kind of get it: you probably want to play Conforto, Shaw, Ballesteros, Amaya and Kelly (the five who more or less rotate in and out) and by the time you add Mr. 26th man, there just aren't many opportunities. So that player has to kind of be able to do: a lot of things "okay" but also be someone you don't mind being the sixth fiddle and someone you pay like being the sixth fiddle.. Like Kingery could probably handle 2b, 3b, LF or RF in a pinch and has a 73rd percentile sprint speed. You don't want to use him, but if you have to...then he can kind of do it okay-ish.
So you get guys like Kingery in that role. The midpoint between "prospect we like but we don't want them to waste away" and "bad enough that this kind of non-playing role is acceptable to this player and the budget".
It's certainly imperfect, but in theory, any injury will be replaced with MiLB talent and if Kingery can't even pinch run or field a ground ball, you can probably find Scott Kingery 2.0 or some version of an upgrade at the deadline for relative cheaply.